Sealing type valve capable of preventing sealing surface of small-opening down-regulation valve from being eroded by blowing and valve

Abstract

The invention discloses a sealing type valve capable of preventing a sealing surface of a small-opening down-regulation valve from being blown and corroded, and relates to the technical field of carbon brushes. The sealing type valve comprises a valve seat, a valve element used in cooperation with the valve seat is correspondingly arranged at one end of the valve seat, a valve seat sealing surface is arranged on the outer side of the end, adjacent to the valve element, of the valve seat, and a valve element sealing surface is arranged on the inner side of the end, adjacent to the valve seat, of the valve element; compared with a traditional sealing type, under the condition of small opening degree, the flow speed of a medium is high, and the medium directly washes the valve element and the valve seat sealing face, the sealing type adopts the mode that the valve seat protrudes outwards and the valve element sinks inwards, when the valve is opened, the medium directly washes the first flat and straight face firstly and then flows through the valve element sealing face, and therefore the sealing effect is achieved. The valve seat sealing face is arranged on the outer side, far away from the channel, of the valve seat and cannot be directly scoured by media, the sealing face is effectively prevented from being directly scoured, inner leakage is reduced, and the service life of the valve seat and the service life of the valve element are prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of anti-erosion of valve seat sealing surface, and in particular to a sealing type and a valve for preventing the sealing surface of a small opening downward regulating valve from being eroded. Background Art

[0002] Valve tightness is the most important indicator for evaluating valves. The traditional valve core sealing surface and valve seat sealing surface are embedded, and the sealing surface directly faces the medium. When the valve is opened, the medium flows between the valve core sealing surface and the valve seat sealing surface, and the medium flushes the valve seat sealing surface and the valve core sealing surface.

[0003] When the sealing form of the traditional valve is just opened or at a small opening, it is inevitable that the medium will scour the valve seat and valve core sealing surface. Especially under the condition of a small opening, the scouring is very serious, resulting in internal leakage of the valve, greatly shortening the service life, increasing safety risks, and causing economic losses.

[0004] Therefore, it is urgent to propose a sealing type and valve that can prevent the sealing surface of a small opening downward regulating valve from being eroded. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the above problems existing in the existing sealing type for preventing the sealing surface of the small opening downward regulating valve from being blown away, the present invention is proposed.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a sealing type for preventing the sealing surface of a small opening downward regulating valve from being blown away, comprising:

[0008] A valve seat, one end of the valve seat is correspondingly provided with a valve core used in conjunction with the valve seat, a valve seat sealing surface is provided on the outer side of the end of the valve seat adjacent to the valve core, a valve core sealing surface is provided on the inner side of the end of the valve core adjacent to the valve seat, and the valve seat sealing surface and the valve core sealing surface fit each other.

[0009] As a preferred solution of the sealing type for preventing the sealing surface of the small opening downward regulating valve from being eroded, a channel is provided inside the valve seat, and the medium flows from one end of the valve seat to the other end of the valve seat close to the valve core through the channel.

[0010] As a preferred embodiment of the sealing type for preventing the sealing surface of the small opening downward regulating valve from being blown away, the valve core sealing surface and the valve seat sealing surface can fit tightly together to cut off the flow of the medium;

[0011] The valve core is lifted upward to separate the valve core from the valve seat, and the medium flows through the passage between the valve core and the valve seat.

[0012] As a preferred solution of the sealing type for preventing the sealing surface of a small opening downward regulating valve from being eroded, the valve seat sealing surface and the valve core sealing surface are both inclined surfaces, and the end of the valve core facing the valve seat includes a flat surface 1, and the flat surface 1 is surrounded by the valve core sealing surface.

[0013] As a preferred embodiment of the sealing type for preventing the sealing surface of the small opening downward regulating valve from being blown away by the present invention, the diameter of the flat surface 1 is larger than the diameter of the channel;

[0014] A second flat surface is disposed on one end of the valve seat facing the valve core, the valve seat sealing surface is adjacent to the second flat surface, and the first flat surface can be tightly fitted with the second flat surface.

[0015] The beneficial effects of the present invention are as follows: compared with the traditional sealing type, under the condition of a small opening, the medium flow rate is fast, and the medium directly flushes the valve core and the valve seat sealing surface. The sealing type in the present invention adopts a form in which the valve seat is convex and the valve core is recessed. When the valve is opened, the medium first directly flushes the flat surface and then flows through the valve core sealing surface. The valve seat sealing surface is arranged on the outside of the valve seat away from the channel and will not be directly flushed by the medium, which effectively avoids direct erosion of the sealing surface, reduces internal leakage, and extends the service life of the valve seat and the valve core.

[0016] In view of the above problems existing in the existing valves, the present invention is proposed.

[0017] In order to solve the above technical problems, the present invention provides the following technical solutions: a valve, comprising any of the above-mentioned sealing types for preventing the sealing surface of a small opening downward regulating valve from being blown away, comprising:

[0018] A valve body, wherein the valve seat is arranged inside the valve body, a first chamber and a second chamber are opened in the valve body, the first chamber and the second chamber are respectively located at two ends of the channel, and the valve core is located in the second chamber;

[0019] The medium flows from the first chamber through the channel into the second chamber.

[0020] As a preferred solution of the valve of the present invention, wherein: the valve body includes a fixed seat, the valve core is movably connected to the fixed seat, and a valve cover is fixedly installed on the outer side of the fixed seat.

[0021] As a preferred solution of the valve of the present invention, a packing is arranged between the fixing seat and the valve core.

[0022] As a preferred solution of the valve of the present invention, an actuator is arranged at one end of the valve core away from the valve body, and the actuator is used to control the movement of the valve core.

[0023] As a preferred solution of the valve of the present invention, a coupling is provided between the valve core and the actuator.

[0024] The beneficial effects of the present invention are as follows: by optimizing the flow path of the medium, the erosion degree of the valve core sealing surface and the valve seat sealing surface is greatly reduced, the service life of the valve is effectively extended, and the safety risk during the use of the valve is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0026] Figure 1 It is a schematic structural diagram of a seal type for preventing the sealing surface of a small-opening downward regulating valve from being blown away according to the present invention.

[0027] Figure 2 It is a schematic structural diagram of the seal type before modification for preventing the sealing surface of a small opening downward regulating valve from being eroded according to the present invention.

[0028] Figure 3 It is a schematic diagram of the overall structure of the valve of the present invention.

[0029] Figure 4 For the present invention Figure 3 A magnified view of point A. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0034] Example 1

[0035] Reference Figure 1-2 , which is the first embodiment of the present invention, provides a sealing type for preventing the sealing surface of a small opening downward regulating valve from being eroded, including a valve seat 100, a valve core 200 used in conjunction with the valve seat 100 correspondingly arranged at one end of the valve seat 100, a valve seat 100 sealing surface is arranged on the outer side of the end of the valve seat 100 adjacent to the valve core 200, and a valve core 200 sealing surface is arranged on the inner side of the end of the valve core 200 adjacent to the valve seat 100, and the valve seat 100 sealing surface and the valve core 200 sealing surface are matched with each other to achieve a sealing effect.

[0036] A channel 102 is provided inside the valve seat 100 , and the channel 102 penetrates the valve seat 100 . The medium flows from one end of the valve seat 100 to the other end of the valve seat 100 close to the valve core 200 through the channel 102 .

[0037] One end of the valve seat 100 facing the valve core 200 is sunken, and the other end of the valve core 200 facing the valve seat 100 is convex. When the valve is closed, the valve core 200 and the valve seat 100 fit tightly at the seal, and the flow of the medium is cut off; after the valve is opened, the valve core 200 is lifted upward and separated from the valve seat 100, and the medium flows through the channel 102 between the valve core 200 and the valve seat 100.

[0038] The sealing surface of the valve seat 100 and the sealing surface of the valve core 200 are both inclined surfaces. The setting of the inclined surface can reduce the friction between the sealing surface of the valve seat 100 and the sealing surface of the valve core 200. The end of the valve core 200 facing the valve seat 100 includes a flat surface 202, and the flat surface 202 is surrounded by the sealing surface of the valve core 200.

[0039] In summary, compared with the traditional sealing type, under the condition of a small opening, the medium flow rate is fast, and the medium directly erodes the sealing surfaces of the valve core 200 and the valve seat 100. The sealing type in the present invention adopts a form in which the valve seat 100 is convex and the valve core 200 is recessed. When the valve is opened, the medium directly erodes the flat surface 202. The sealing surface of the valve seat 100 is arranged on the outside of the valve seat 100 away from the channel 102 and will not be directly eroded by the medium, which effectively avoids direct erosion of the sealing surface, reduces internal leakage, and extends the service life of the valve seat 100 and the valve core 200.

[0040] Example 2

[0041] Reference Figure 4 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the diameter of the flat surface 1 202 is larger than the diameter of the channel 102; the end of the valve seat 100 facing the valve core 200 is the flat surface 2 103, the sealing surface of the valve seat 100 is adjacent to the flat surface 2 103, and the sealing surface 2 of the valve seat 100 is distributed on the periphery of the flat surface 2 103.

[0042] When the valve is closed, the flat surface 1 202 can be closely abutted against the flat surface 2 103 , and the sealing surface of the valve seat 100 and the sealing surface of the valve core 200 are closely abutted, preventing the medium from contacting the sealing surface of the valve core 200 and reducing the erosion of the sealing surface of the valve core 200 by the medium.

[0043] When the valve is opened, if the diameter of the straight surface 202 is smaller than the diameter of the channel 102, the sealing surface of the valve core 200 is susceptible to direct erosion; when the valve is opened, the medium impacts the straight surface 202 of the valve core 200 and will be dispersed within a certain range. The diameter of the straight surface 202 is larger than the diameter of the channel 102, and the sealing surface of the valve core 200 is farther from the direct impact surface, which can effectively reduce the degree of erosion of the sealing surface of the valve core 200.

[0044] When the medium impacts the flat surface 1 202 , it is easy to rebound to the sealing surface of the valve seat 100 . The existence of the flat surface 2 103 on the valve seat 100 can effectively avoid this situation and extend the service life of the sealing surface of the valve seat 100 .

[0045] The remaining structures are the same as those of Example 1.

[0046] Example 3

[0047] Reference Figure 3-4 , which is the third embodiment of the present invention, and this embodiment is different from the second embodiment in that: a valve, which includes the sealing type for preventing the sealing surface of the small-opening downward regulating valve from being blown away as mentioned above, including a valve body 300, and a valve seat 100 fixedly connected to the inner side of the valve body 300.

[0048] A first chamber 301 and a second chamber 302 are provided in the valve body 300. The first chamber 301 and the second chamber 302 are respectively located at two ends of the channel 102. The valve core 200 is located in the second chamber 302. When the valve needs to be opened, the valve core 200 is controlled to move up and away from the valve seat 100, and the medium can flow from the first chamber 301 through the channel 102 and enter the second chamber 302 from between the valve core 200 and the valve.

[0049] By optimizing the flow path of the medium, the erosion degree of the sealing surface of the valve core 200 and the sealing surface of the valve seat 100 is greatly reduced, which effectively prolongs the service life of the valve and reduces the safety risk during the use of the valve.

[0050] The valve body 300 includes a fixed seat 303, and the valve core 200 is movably inserted in the fixed seat 303. A valve cover 304 is fixedly installed on the outside of the fixed seat 303. The valve cover 304 is used to fix the seat 303 to enhance the structural strength of the valve. A packing 305 is arranged between the fixed seat 303 and the valve core 200. The packing 305 is used to enhance the sealing between the valve core 200 and the fixed seat 303.

[0051] An actuator 400 is provided at one end of the valve core 200 away from the valve body 300. The actuator 400 is used to control the movement of the valve core 200. A coupling 401 is provided between the valve core 200 and the actuator 400 for transmitting power and signals so that the valve can realize the switching, adjustment and control functions.

[0052] The remaining structure is the same as that of Example 2.

[0053] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0054] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0055] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A seal type for preventing the sealing surface of a small opening downward regulating valve from being blown away, characterized in that: include, A valve seat (100), wherein a valve core (200) for use with the valve seat (100) is correspondingly arranged at one end of the valve seat (100), a valve seat (100) sealing surface is arranged on the outer side of the end of the valve seat (100) adjacent to the valve core (200), and a valve core (200) sealing surface is arranged on the inner side of the end of the valve core (200) adjacent to the valve seat (100), and the valve seat (100) sealing surface and the valve core (200) sealing surface are matched with each other.

2. The seal type for preventing the sealing surface of a small opening downward regulating valve from being blown away according to claim 1 is characterized in that: A channel (102) is provided on the inner side of the valve seat (100), and a medium flows from one end of the valve seat (100) to the other end of the valve seat (100) close to the valve core (200) via the channel (102).

3. The seal type for preventing the sealing surface of a small opening downward regulating valve from being blown away according to claim 2 is characterized in that: The sealing surface of the valve core (200) and the sealing surface of the valve seat (100) can fit tightly together to cut off the flow of the medium; The valve core (200) is lifted upwards to separate the valve core (200) from the valve seat (100), and the medium flows through the passage (102) between the valve core (200) and the valve seat (100).

4. The seal type for preventing the sealing surface of a small opening downward regulating valve from being blown away according to claim 3 is characterized in that: The sealing surface of the valve seat (100) and the sealing surface of the valve core (200) are both inclined surfaces, and one end of the valve core (200) facing the valve seat (100) includes a straight surface one (202), and the straight surface one (202) is surrounded by the sealing surface of the valve core (200).

5. The seal type for preventing the sealing surface of a small opening downward regulating valve from being blown away according to claim 4 is characterized in that: The diameter of the flat surface 1 (202) is greater than the diameter of the channel (102); A second flat surface (103) is provided at one end of the valve seat (100) facing the valve core (200); a sealing surface of the valve seat (100) is adjacent to the second flat surface (103); and the first flat surface (202) can fit tightly against the second flat surface (103).

6. A valve, comprising a seal type for preventing the sealing surface of a small opening downward regulating valve from being eroded as claimed in any one of claims 2 to 5, characterized in that: include, A valve body (300), wherein the valve seat (100) is arranged on the inner side of the valve body (300), and a first chamber (301) and a second chamber (302) are provided in the valve body (300), wherein the first chamber (301) and the second chamber (302) are respectively located at two ends of the channel (102), and the valve core (200) is located in the second chamber (302); The medium flows from the first chamber (301) through the channel (102) into the second chamber (302).

7. The valve according to claim 6, characterized in that: The valve body (300) comprises a fixed seat (303), the valve core (200) is movably connected to the fixed seat (303), and a valve cover (304) is fixedly mounted on the outer side of the fixed seat (303).

8. The valve according to claim 7, characterized in that: A packing (305) is provided between the fixing seat (303) and the valve core (200).

9. The valve according to claim 8, characterized in that: An actuator (400) is provided at one end of the valve core (200) away from the valve body (300), and the actuator (400) is used to control the movement of the valve core (200).

10. The valve according to claim 9, characterized in that: A coupling (401) is provided between the valve core (200) and the actuator (400).

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